Combination oil and gas burner



March 26, 1940. s E, HENSON 2,195,170

COMBINATION OIL AND GAS BURNER` Filed Feb. 17, 1939 Zilli/[11111] Il] 1li/1 lfv ed intermediate its Patented Mar. 26, 1940 I .UNITED stares PATNT, ortica 2,195,170 COMBINATION OIL AND GAS BURNER l Smith E. HensonJoplin, Mo. v Application February 17, 1939, Serial No. 256,990

geminis. (C1. 158-11) K This invention krelates to combination oil and gas burners, and has for one of its objects the production of a simple kand eicient burner formed with passages each ofl which is constructlength to provide an air intake at one end and an outlet at its other end, the said passages extending transversely of the burner and arranged throughout the length thereof, and which is also constructed in a manner to facilitate combustion and-,to produce a maximum of` B. t. u.s or heat units per foot of gas consumed.

A further object of this invention is the production of a simple and encient burner constructed of metal, refractory material or other similar material in a manner to efli'ciently support the ignition plate which may be formed of carbofrax or refractory material, and hold the same rigid at all times. v

Other objects and advantages of the present invention will appear throughout the following specification and claims,

In the drawing:V Figure 1 is a perspective view of the burner, a ncertain portion `thereof being shownvin section; Figure 2 is. an irregular vertical sectional view taken through one of the air'passagesy of the burner; f f Figure 3 isa sectional perspective View of ya part of the b1 rner;

Figure 4 isa horizontal line 4 4 of Figure 2;

Figure 5 is'an enlarged sectional `View taken on line 5-5 of Figure 2.

By referring to the drawing, it will be seen that il] designates the body or hull of the burner which is preferably formed of metal; refractory material or the like, and is adapted to support p the ignition plate II preferably formed of car- -bofrax or other suitable refractory material. The body or hull i preferably'comprises an elongated box-like structure .or rectangular casing having upper and lower parallel flanges I2 and I3 projecting from the casing. j The ignition plate VII is fitted between these flanges I2 and is firmly held-'in engagement with the body or hull Iii by means of the headed lugs It. I t are formed integral with the body or hull I0 and carry enlarged heads I around which the ignition plate of refractory material and the like is molded, thereby providing a unitary structure for the body Iii and ignition plate I I. Any number of these lugs I4 may be located throughout the length of the burner to firmly hold the ignition plate in engagement with the body.

sectional View taken on These headed lugs"l will not require a motor The body Il) of the burner is provided with a` central partition i6 for separatingthe` body or hull ill into a bottom liquid fuel compartment or reservoir Il', and a top gas compartment or resery Voir I8. The casing 0r hull I0 andthe ignition plate I I` are providedwith diamond-shaped passages IS which extend transversely of the the passages contracting toward the adjoiningv faces of the body or hull Y I Las shownin Figure V2.y Preferably the corners 10" of these passages l5 are rounded so as to eliminate sharp or abrupt turns and thereby reduce noise. By ,considering Figure 2 it will be seen .that the passage I9 illustrated therein tapers toward its center or the junction faces 2il,.as 15' above stated, and ares outwardly toward the inlet and outlet ends of the passage I 9. The body or hull I9 of the burner is provided with a vgas entrance yport 2I communicating with the gas compartment or reservoir I8 and a liquid fuel en- 90"l trance port 22 communicating with the liquid fuel compartment or reserv` ir Il. These ports 2i and 22`are suitably threaded for the purpose ofy receiving the supply pipes 23 and' 24 respectively, as indicated in dotted lines in Figure 2; Suitable orilices -25 are formed or drilled in the side Walls of the diamond-shaped air passages I9 and are preferably formed-in the left-hand walls thereof, as'shown in Figure l. An integral defiector lip 26 is carried by kthe passages adjacent each orice and in a position to overhang the same, as shown inthe drawing, andare inclined inwardly so as to direct the oilr vapor land gas in the direction of the ignition plate II. yIn other words, these lips orjigs 26 are' Sli properly directed against. the carbofrax ignition plate II. i

a burner which may be ecounderstocd that there has been produced a burner which will operate eciently on a gas pressure of approximately one ounce or more'and which or .other power to vaporize the gas or liquid fuel.V

When the burnerisin operation, the ignition plate I I vaporizes the oil or liquid fuel into a gas, which fuel is delivered direct from thefuel chamber II through the orices 25 leading from this chamber,` the fuel passing into the diamondlshaped air passages I9, the air entering the outer 'ends of the passages I9 and passing through and Q66 Walls of the air 3()-yk fuels separately,

.'.urn of the lips 2t keeping being discharged through the inner ends of the passages on the side of the burner adjacent the ignition plate I I. The heat of the ignition plate causes the natural gas to expand before it is delivered to the orifices 25 of the burner, thereby creating a pressure within the hull I of the burner and converting a low pressure gas into a highpressure gas. This converted high pressure gas is then delivered directly through the orifices 25 out into the air passages I9 in the direction of the ignition plate II where the gas is burned before the gas has time to contract, in this way obtaining maximum B. t. u.s in proportion to the gas consumed.

A s shown in the drawing the burner is provided with the central partition I6 running longitudiand centrally thereof, in this way `providing the lower oil or liquid fuel reservoir Il and the upper gas reservoir I8. Because of this structure it is practical to use the burner to burn either of the or both fuels simultaneously. In other` words, one-half of the burner running lengthwise carries the liquid fuel and the other half carries thenatural gas.

.The heat from the ignition plate II heats the liquid fuel. to convert the liquid fuel into a vapor which is then ydelivered directly through the ori fices 25 into the mixing chambers or air passages The vapor is delivered through the orifices 25 into the diamond-shaped air passages formed in the hull of the burner and thev natural gas or vapor from the liquid fuel is directed against the carbofrax ignition plate vII through the medithe ignition plate at a desired temperature at all times. The lugs I4 will firmly hold the ignition plate in engagement with the hull ill and in a rigid position.

As shown and previously described, the air pas- W sages i9 which are preferably diamond-shaped mixingl chambers and the 60g extend through the hull and are surrounded by walls 2l and these walls 2l in conjunction with the spaced outer wall of the hull Ill will provide a circulating compartment or passage through which the fuel may freely circulate and cornrnunicate with the respective'ports 2I and 22 whereby the fuel may be replenished to the reservoirs Il and I8. ThepassagesIS are used as throat of each air pashull with the ignition plate at the face indicated by the numeral 2li and which is located approximately at the center of; each diamond shaped air passage causes the air entering the 'passage to be delivered to the throat of the burner from its entrance end at a high rate of vspeed and the restriction of this passage I9 centrally will reduce the speed of the air to a very low velocity causing the heat from the fuel to remain -in the firebox or furnace much longer than would be possible if the air rushed through at a high rate of speed. It will be noted that the carbofrax ignition plate Il is of suitable thickness and projects over the inner face of the hull of the burner in a manner to properly protect the same from the heat from the furnace, It is preferable to r`frax face.

nally through the hull or body I0 from end to end sage I9 by being restricted at the junction of the `holding provide oval-shaped corners at the junction of the walls of the air passages I9 and to round the outside edges thereof to eliminate the passage of air over sharp corners thereby producing a burner which is practically noiseless.

The Venturi shaped passage takes the air from the outside at a high velocity, through the'throat of the'burner, which is shown at 2B, it causes the air and gas to pass that point at a low speed, which is delivered direct through the flaring portion of the passage in the carbo- The larger end of the flaring portion of the passage is at the outside of the carbofrax ignition plate which is inside the rebox or boiler. This causes the air and gas to pass through the rebox at a very slow speed.

Having described the invention, what is claimed 1s:

1. A burner of the class described comprising a hollow body having a liquid fuel reservoir and a gas fuel reservoir, the body having-a plurality of transversely extending air passages extending from the outer face to the inner face thereof, an ignition plate xed against the inner face of the body and having passages communicating with and providing continuations of the air passages in the body, said body having orifices formed in the walls of the air passages for delivering fuel from the respective reservoirs into the air passages, and integral lips extending from the walls of the air passages at van incline toward said ignition plate and extending, across said orifices in spaced relation thereto for directing the fuel toward the ignition plate.

2. A burner of the class described comprising a hollow body having a liquid fuel reservoir and a gas fuel reservoir, the body having a transversely extending air passage extending from the outer face to the inner face thereof, an ignition plate xed against the inner face of the body and having a passage `registering with and providing a continuation of the air, passage in the body, the companion passages in the body and in the ignition plate being constricted toward their junction to provide a restricted throat, and said body having orifices formed'in the Walls of the pas sage formed therethrough for delivering fuel from the respective reservoirs into the said air passage.

3. A burner of the class described comprising a .hollow body having a liquid fuel reservoir and a gas fuel reservoir, the body having a plurality of transversely extending air passages extending from the outer face to vthe inner face thereof, an ignition plate fixed against the inner face of the body and having passages communicating with and providing continuations of the air passages in the body, upper and lower flanges carried by the body and overlying the upper and lower faces of the ignition plate, headed lugs carried by the body and embedded in the ignition plate for the ignition plate rigidly against the body, and'said body having orifices formed in the walls of the air passages for delivering fuel from the respective reservoirs into the air passages.

SMITH E. HENSON.

and when it passes v 

